And ahira tyrrell



(Nomodel.)v 4

J. LATHROP 8v A. TYRRELL. PULLBY.

i lll Patented Au N. PETERS. Pnmumngnphpr. waminmn, mc.

UNITED STATns PATENT Ormea.

JOSEPH `LA'IHROP, -OF CHICAGO, ILLINOIS, AND AHIRA TYRRELL, OF KEN DALL, MICHIGAN.

PU LLEY.

I SPECIFICATION'orming part of Letters Patent No. 367,984, dated August 9, 1887.

Application lcd January 2f), 1887. Serial No. 225,859. (No modeL Aing to be a full, clear, and exact description,

reference being had to the accompanying d rawings, forming part of this specification.

Our present invention has relation to the improvement of that class of pulleys or other wheels the `bodies of` which are composed, preferably, of disks oi' veneer provided with a .central metal hub bolted thereto and with an exterior rim or tire firmly bolted to the outer periphery of the disks; and particularly does our invention relate to thev improvementof the construction of vwheel or' pulley set forth in Letters Patent No. 325,251, granted to us l Septemberv 1, A. D. 1885, in whiehrLetters Patent the veneer disks comprising the body of the wheel were bolted to flanges formed upon the central hub, an open space beingleft between the disks adjacent the hub. By our present invention the disks are bolted to the hub; but between the disks at a point adjacent the'hub braeeblocks are provided, which Iill the space between the veneer disks at such point and aiiord a more secure bearing for said disks than would Abe possible were such blocks omitted.

Our invention consists, primarily, in pro viding the body of a wheel or pulley with brace-blocks placed between the veneer disks adjacent to the periphery ofthe hub to which said disks are bolted.

Our invention also consists in certain other features of construction hereinafter described, illustrated 'in the accompanying drawings, and particularly pointed out in the claims at the end of 'this specification.

Figure l is aview in side elevation, and Fig. 2 a View in vertical transverse section, ot' a ear-wheel embodying one form of our inveng is a view in vertical transversek l vertical transverse section of a beltpul'ley of parts and are provided at their threaded ends.

with nutsf, by means of which the clamping ring can be iirml y drawn toward the flange a in order to clamp or bind the several disks and the intermediate brace blocks or rings.

The several disks composing the body of the wheel are formed each of thin sheets of wood veneer firmly glued together with their grains crossed, as in our former patent, the disks B and C being by preference flat and extending in the same plane, while the outer disk, D, is formed with the annular depression intermediate the periphery and hub of the Wheel.

Between the disks B and C in the construe tion shown in Fig. 2 a single brace-block, G, is placed, in which block is formed au annular groove to receive the edge ofthe central disk, C, and through which block and the disks B and D pass the clamping-bolts H, which pass through the flange t' of the tire or rim I, and firmly bind the outer edges of the disks upon the brace-block and hold the tire or rim I of the wheel securely in place upon the periphery of the wheel.

In the modified construction shown in Fig. 3 the outer brace-block between the disks that compose the body of the wheel'is divided to form the sections G and G2, and between these sections is extended the intermediate disk, C, which bears against the inner face of the tire I. Our purpose in placing the brace-blocks between the several `disks at their bearing point upon the hub is to render the body of the wheel at such point of such broad and firm construction as if the body of the wheel at such point were of a solid piece, and at the same time to permit the several disks to be securely forced and bound togetherby means of a single set of clampingbolts. The brace- IOL) blocks at the oiitei' edge of the disks servenot only to properly hold the disks separate from each other, but also afford a broad and firm periphery against which the tire of the wheel may bear, and enables the disks to be securely clamped against the inwardly-proj ecting flange of the tire. Our purpose in employing a central disk, C, between the outer disks, B and D, is to offer a more direct resistance to the vertical strain upon the wheel when traveling in straight line upon a railway-car track, and our purpose in provioing the outer disk, l), with the annular groove is to brace this disk more securely against the strain which is thrown upon it when the outer llanges of the tire are forced against the rails, and also to giveto the wheel more elasticity than it would have were such disk perfectly iiat.

In Figs. 4 and 5 of the drawings, in which our invention is shown as applied. to a split pulley, the linb of the pulley consists of the separate parts A2 and A", adapted to be el aniped together by the bolts s when thepulley is placed upon the shaft. Each ofthese sections A2 and A of the hub is provided with a seni-aiinular tlange, a', and between these ilanges c are clamped the disks Il and C and the braceblocks E by means of the bolts F. The sectional hub foi-ined of the parts A and A is' of a length'inside the flanges e less than the combined thickness of the disks B' and C and the brace-blocks IY, so that when the brace-blocks and disks are clamped between the ilanges a of the hub the body of the hub will form a secure bearing for the disks and braceblocks. In this construction the body of the wheel or pulley is formed of but two .ilat disks, oneat each side of the center, so that in the pulley the strain from periphery to hub is uniform.

Between the outer edges of the disks B and C are placed the brace-blocks G, which in this construction serve also to forni part of the rim I of the wheel, and the brace-blocks and the disks are clamped together and to the rim ofthe wheel by means of the bolts H, which pass through these parts and also through the [hinges of the strips K, that form part of the rim of the wheel and project inwardly therefrom. rIhe rim of the wheel in this construction is formed ofa number ofaniiiilar rings composed of thin sheets-of crossgrain veneers lirnily glued together.

In the eoiistrnctioii shown in Fig. 6 tlieliub is formed of two sections, as already described, and but a single disk is employed to form the body ofthe wheel. In order, however,to give to this disk a broad firm bearing upon the hub, there is provided the brace-blocks E2, one on either side of thodisk, through which pass the clamping-bolts, which firmly unite thesebraec blocks and the disk with the ilanges o. of the hub. In this construction a single disk, A', is extended through and forms part of the rim K of the pulley, which rim, like that shown in Fig. 5, is composed of annular rings formed, by preference, of cross-grain veneer, and the disk is firmly clamped to the ring by means of the bolts ll, which pass through the inwardly-projeating Ilanges l of the rings L, that adjoin the disk and forni part ofthe rim.

Having thus described our invention, what we cl ai ni as new,an d desi re to secure by Letters Patent, is

l. In a wheel or pulley, the combination, with the hub and the disks forming the body, ofbrace-blockssiirroniid ing the hub and bolted thereto and to the body, substantially as described.

2. In a wheel oi pulley, the combination, with the hub having a lange, of the diskscoinprising the body of the wheel, the interme diate brace-bloeks between said disks, and a clampingring and bolts .for lirnily binding said brace-blocks and disks together to forma broad bearing around the huh, substantially as described.

Il. In a wheel or pulley, the combination, with the hub and the disks comprising the bodyof the wheel or piilley,of the braccblocks encircling the hub, the brace-blocks located between the disks at their peripheries, and suitable bolts foriiniting said disks and braceblocks, substantially as described.

4. In a wheel, the combination, with the hub A, having a ilange, e, and the clampingring A, of wooden disks and brace'blocks intermediate said disks and bearing upon the hub, brace-blocks intermediate said disks and bearing upon the tire, and suitable bolts for coiiiiectiiigtlieparts,substantiallyasdescribed.

Ina wheel, the combination, with the liub, of the body composed of the disks B, C, and I), the intermediate bracebloeks,E, and the interinediatebrace block or blocks, (i, substantially as described.

6. In a wheel, the combination, with the hub, of a. body composed of wooden disks, the outer disk having an annular depression between its rim and center, and suitable braccbloeks between the disks at the hub and periphery, substantially as described.

JOSEPH LATI-IHOP.

\Vitnesses for J. Lathrop:

Jiuics I[. Pinnen, FRANK L. DoUeiLAs.

Alli ltA lY l-tltlCLL. Witnesses for A. Tyrrell: .Liuns lvl. Pinnen. Giio. l). Fi'siiim, Jr.

IOO

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